crandall



Patented Feb. 28,1899.

L. E. CBANDALL.

BICYCLE SEAT POST.

(Application fllbd Nov. 28, 1 898.)

(No Model.)

WITNESSES:

THE walls PETERS 00., PHOTO-LWHU.. WASHINGTON, u. c.

NITED STATES PATENT OFFICE.

LYMAN E.- CRANDALL, OF NEW YORK, N. Y., ASSIGNOR TO THE WATSON AUTOMATICSEAT POST COMPANY, OF SAME PLACE.

BICYCLE SEAT-PO ST.

SPECIFICATION forming part of Letters Patent No. 620,422, dated February.28, 1899.

Application filed November 28, 1898. Serial No. 697,654. (No model.)

To all whom it may concern.-

Be it known that I, LYMAN E. CBANDALL, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Bicycle Seat-Posts;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to seat-posts for bicycles, but is moreparticularly-intended as an improvement upon the construction shown anddescribed in Letters Patent No. 607,181,

issued July 12, 1898, to George W. Lord. In this patented constructiontheinclined members of the seat-post were constructed each in two piecesat the top portions, where the seat-supporting lever was pivoted, andonev My present invention is the result of costly experience gainedthroughout the past year in the manufacture of these seat-posts, and Iam to overcome all the defects heretofore noted; and with these ends inview my invention consistsin certain details of construction andcombination of parts, such as will be hereinafter fully explained andthen specifically designated by the claim.

In the accompanying drawings,which form a part of this application,Figure l is a sectional elevation of my improved seat-post; Fig. 2, arear elevation thereof; Fig. 3, a detail perspective illustrating one ofthe members of my improved post, and Fig. 4 is a detail perspective ofthe seat-supporting lever.

Similar numbers of reference denote like parts in the several figures ofthe drawings.

I form the members 1 2 of my improved seat-post by striking them up outof sheet metal, so that when said members are placed together theirmeeting edges are oppositely .plain cheek-pieces 5 6.

inclined, while their cross-sections through their general length arecircular. The upper portions or heads of these members are integral withthe body portions and are formed up so as to present contracted necks 34 and 7 8 are blocks shaped to generally correspond to the shape ofthese cheek-pieces and placed between the latter as reinforce-sections,said blocks being cut away to form notches 9 10, and the edges of thesecheek-pieces opposite said notches are crimped into said notches, asshown at 11 12.

The seat-supporting lever comprises a cylindrical bar 13, upon which thesaddle is clamped, and parallel plates 14, which latter haveperforations 15 1617. The upper extremities of the members 1 2 arepierced through their cheek-pieces and respective blocks, as shown at 1819, the perforation 18, which is pierced in the member 1, being slightlyelongated for the purpose presently explained.

In assembling my improvement for use and in case the saddle is to beplaced and supported forward of the seat-post I place the seatsupportinglever over the members 1 2 so that the holes 15 17 will register withthe perforations 18 19 in the members, and I then unite these partsby-means of suitable pins or screws 20 21.

When the members of the seat-post are in position on a bicycle with thelever 13 extending in a horizontal plane, the elongated perforation 18will be disposed horizontally, so that it will be clear that any weightupon the leverbar 13 will tend to force the pin, 20 against a perfectlyflat surface, so that there can be no wedging or binding action betweensuch pin and perforation 18, such as might render it exceedinglydifficult to remove the seat-post. I

When the parts are in position, as shown at Fig. 1, the perforations 16have no function whatever; but when it becomes desirable to reverse theposition of the seat-supporting lever the perforations 17 16 are inregistration with the openings 18 19, while in this latter instance theperforations 15 have no function.

It will be observed that in both positions of the seat -supporting levera horizontal line diametrically through the openings 17 will bisect thespace which separates the openings 15 16, so that it will be clear thatwhether the seat-supporting lever is in one position or the other thepin or screw which extends through the elongated slot 18 will alwaysbear against a perfectly flat surface with no wedging action whatever.

My present improvement possesses great advantages in that my seat-postmembers are exceedingly cheap and strong and for the further reason thatI am enabled to reverse the position of the seat-supporting-lever barwith the greatest facility.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In a bicycle seat-post comprising members having oppositely-inclinedinner edges, the combination of the perforated heads of the seat-postmembers, with the seat-supporting lever having parallel plates throughwhich are formed perforations from side to side disposed in the form ofan isosceles triangle, one of said perforations being near the end ofsaid plates while the other two are in the same vertical plane when thebar is in a horizontal disposition, and the pins passed through theperforations in said plates and members and whereby one of said membersis pivoted to said plates when the other member is loosely connectedbetween such plates, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

LYMAN E. CRANDALL.

Witnesses:

F. W. SMITH, J12, M. T. LONGDEN.

